Ideal adjustment, longitudinal direction

Side window glass (1) must be positioned at distance (A) to door window glass (2).

Measurement (A) = 19 ± 1 mm

Parallelism deviation ± 1 mm.

Side window glass (1) may have a max. underprotrusion (B) to door window glass (2).

Measurement (B) = 2 mm

Fig 1: Identifying Side Window Glass At Distance

Courtesy of BMW OF NORTH AMERICA, INC.